Improved process of making suction rubber hose



tnittd mes @aan dimite.

GEORGE C. SMITH, OF MAT'IEAWN, NEW YORK.

' Letters Patent No.792,381, dated July 6,1869.

IMPRVED PROCESS OIEMIAKINGl S'U'CTION RUBBER HOSE.

The Schedule referred to in these Letters Patent and making part f the same.

To all 'whom it may' concern .consists in making suction-hose with hard-rubber or gutta-percha compound, cut in strips of suitable length and width, and wound spirally or in rings around a pipe, thenl covered with ordimufy material for making.

hoseyvulcanizing 'it all at one time, thereby l making, as it were, one piece of it.

In order to enable others skilled in the' art to which my invention appertains, to make the same, I wil. now proceed to describe the manner in which the same is or may be done, referring to the annexed drawings, in Which- Figure 1 is a section view of my hose.

Figure 2 is an end view of the same.

Figure 3 is a side elevation of the inside pipe, showing the manner of windingr the strips around it.

l' take, first, a pipe, ofthe diameter desired for the lui-se, and wind around it strips oi hard-rubber or guttapercha compound, either Spirally, or in a ring-form. hese strips are of different compound, so that the rings will alternate, one hard and lone soft. This rubber lining is then covered with the ordinary material for making hose, when it is all vulcanized at one time, making almost one piece of it, only that one ring is soft, an'd the other hard, so that it will bend, the hard compound vuloanizing harder, and preventing'external pressure.

The rubber or gatta-percha compound, which I have mentioned as being wound around the ppe,'may be placed in the centre, or any place where deemed best, as well as next to the pipe, the idea or principle of my invention being, to substitute-rubber or gutta-peroha supports, for the metal ones usually employed in the manufacture of suction-hose.

Fromloug experiments, 1 have found that this can best be accomplished, by using strips .of suoli com'- poun'ds, of different degrees of hardness, so that when the hose is formed, and all vulcanized at one time, the rings, whether formed round, or spiral, may alternate, one comparatively hard, andthe other soft, therebygiving to the vhose not only the ,required degree oi' stillness, but also the ,necessary elasticity for bending.

Itis evident that this will be the case equally as i well .if thernhber. is' placed in the centre, or even on the outside, as when it forms the inner lining vof the hose.

Having thus described my invention,

What I claim as new, and desire to secure-byLetters Patent, is-

l. The 'above-described process for making suctionhose, substantially in the manner and for the purpose set forth. ,Y 2. Vulcanizing rubber or gutta-percha compounds, of different degrees yof hardness, in and at the same heat, thereby making of it, as it wcre,lone piece, substantially as and for the purposes herein set forth.

3. Suction-hose, formed, as described, of strips oi' hard rubber or gutta-percha, of different degrees of hardness, wound either spirally or in a ring, combined with the usual material for making' hose, and allvulcanized at one time, substantially as and for theV purposes herein set forth.

In testimony that I claim the foregoing, I have hereunto set my hand, this 24th day of May, 1869.

' GEO. O. SMITH'.

Witnesses:

D. C. OAKLEY, W. N. RICHARDS. 

